High blood pressure can occur in pregnancy in two forms. It may be a preexisting condition, called chronic hypertension, or it can develop during pregnancy--a condition known as gestational hypertension. It is also called toxemia or preeclampsia and occurs most often in young women with a first pregnancy.
AC relays. AC relays are manufactured similar to their DC counterparts. If AC current is applied to a DC relay, the relay will pulse at the frequency of the AC current. To overcome this problem, the core is equipped with a shading ring on one-half of the core (Photo 2).
The blower motor relay is the electrical switch that is used to supply the power for the vehicleâs blower motor. The blower motor is the component responsible for pushing air through the vents of your vehicleâs heating and air conditioning systems. Without it, the AC system will not be able to circulate any heated or cooled air.